Home / 3,121.13-4,681.70-1,974.17

Finding the Fourth Proportional to 3,121.13, 4,681.70 and 1,974.17

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Solution

The fourth proportional to 3,121.13, 4,681.70 and 1,974.17 is: 2,961.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.13 : 4,681.70 = 1,974.17 : x
  2. Step 2: Convert to fraction form
    3,121.13/4,681.70 = 1,974.17/x
  3. Step 3: Cross multiply
    3,121.13x = 4,681.70 × 1,974.17
  4. Step 4: Simplify right side
    3,121.13x = 9,242,480.93
  5. Step 5: Solve for x
    x = 9,242,480.93/3,121.13
  6. Step 6: Final answer
    x = 2,961.26

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.